A decentralized infrastructure for query answering over distributed ontologies
A decentralized infrastructure for query answering over distributed ontologies
复制标题
用于通过分布式本体进行查询应答的去中心化基础设施
DOI：
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发表时间：
2007
期刊：
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通讯作者：
Yimin Wang
中科院分区：
文献类型：
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作者：
P. Haase;Yimin Wang
在本文中，我们描述了一个基础设施的查询回答分布式本体上的语义Web。该基础设施解决了（i）使用关于在分散式注册表中管理的所提供资源的元数据的多个节点的协调，以及（ii）通过表达映射形式主义沿着与用于查询应答的相应推理算法的异构本体之间的中介。我们的方法是基于一个虚拟的整合，表现出的语义，如果所有的本体都集成在本地。实际上，分布式本体仍然驻留在远程对等体上，并且只有与回答查询相关的部分需要被检索到本地节点。在KAONp2p中实现的实验评估表明，该方法是非常有前途的，因为查询应答的性能基本上由数据的大小决定，并且仅受分布和异构程度的轻微影响。
In this paper we describe an infrastructure for query answering over distributed ontologies on the Semantic Web. This infrastructure addresses (i) the coordination of multiple nodes using metadata about the provided resources managed in a decentralized registry and (ii) the mediation between heterogeneous ontologies via an expressive mapping formalism along with corresponding reasoning algorithms for query answering. Our approach is based on a virtual integration that exhibits a semantics as if all ontologies were integrated locally. Practically, the distributed ontologies still reside on the remote peers, and only the parts relevant for answering the query need to be retrieved to the local node. Experimental evaluations with the implementation in KAONp2p show that the approach is very promising, as the performance of query answering is essentially dominated by the size of the data, and only slightly affected by the degree of distribution and heterogeneity.